Dual Core

Why are dual core processors better than single core?

 

It's basically like having two processors. You can run multiple applications faster, and when client-side software starts to get coded for multi-threading, then they will also run faster.

You could also try googling:
http://www.google.com/search?q=dual...ient=firefox-a&rls=org.mozilla:en-US:official

 

Do all apps benefit from Dual cores or only certain apps?

 

at the moment only a select few. but as ppl go dual-core so will the software. and thats gonna happen soon with windows vista....

 

All applications benefit dual core to some degree. Applications don't have to be multithreaded, the load is still balanced between the cores, making your system overall more responsive when multitasking.

So in a way, yes, all appliations benefit. Ones that are multithreaded benefit tremendously.

Some games have quirks with it though.

The new Elder Scrolls game, Oblivion is multithreaded and benefits from it.